New firmware updates have begun rolling out for two popular carrier-branded Samsung devices in the last few days. These updates are for the T-Mobile Galaxy S III LTE (T999L) and the Verizon Galaxy S 4.

The update for the T999L comes in at version T999LUVUBMK4 and brings the device up to Android 4.3 Jelly Bean. In addition to upgrading the device to Android 4.3, the update also brings Samsung KNOX technology and Galaxy Gear support. This update comes in the form of a staged rollout, so you can expect to receive an OTA update notification in the coming days if you haven’t already. You can also manually update to MK4 via Samsung Kies. For your convenience, XDA Forum Member red rocket has mirrored the OTA update on his Google Drive account. And those who’d rather install a KNOX-Free and pre-rooted version can do so, thanks to XDA Recognized Contributor DocHoliday77 who took the official MK4 OTA, rooted it, and removed KNOX and CiQ.

The Verizon Galaxy S 4 update, on the other hand, is a much smaller update. It is only a 28.1 MB incremental OTA that fixes various bugs relating to data performance and charging with non-Samsung chargers. If you wish to get your hands on the update a bit early, you can thanks to XDA Senior Member Sir_Eagle who mirrored the OTA on Dropbox.

Have you received the OTAs on your T-Mobile Galaxy S III LTE or Verizon Galaxy S 4? If so, let us know your experiences with the latest firmwares.

About Author

Will Verduzco is the Portal Administrator for the XDA-Developers Portal. He has been addicted to mobile technology since the HTC Wizard. But starting with the Nexus One, his gadget love affair shifted to Google's little green robot. He is also a Johns Hopkins University graduate in neuroscience and is now currently studying to become a physician.

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